Stop mechanism



Apr. 17, 1923. 1,452,357

J. B. BURTON STOP MECHANISM Filed May 20. 1920 2 Sheets-Sheet 1 Apr. 17, 1923. 1,452,357

J. B. BURTON STOP MECHANISM Filed May 20. 1920 2 Sheets-Sheet 3 Patented Apr. 17, 1923.

UNITED STATES 1,452,351 PATENT OFFICE.

JESSE B. BURTON, OF WATERBURY, CONNECTICUT, ASSIGNOR TO- THE WATERBURY FARREL FOUNDRY AND MACHINE COMPANY, OF WATERBURY, CONNECTICUT, A

CORPORATION OF CONNECTICUT.

STOP MECHANISM.

Application filed May 20, 1920. Serial No. 382,876.

To all whom it may concern:

Be it known that I, Jnssn B. BURTON, a citizen of the United States, residing at Waterbury, in the county of New Haven 5 and State of Connecticut, have invented certain new and useful Improvements in Stop Mechanisms, of which the following is a specification, reference being had therein to the accompanying drawings.

This invention relates to new and improved stop mechanism and particularly to means for automatically stopping the movement of machine elements, if through abnormal conditions they do not operate as de- |5 sired, thereby preventing, among other things, the breaking of parts and destruction of the devices being operated upon.

It is the object of this invention, among other things, to produce a mechanism for the purpose as substantially above set forth that it will be simple in its construction and design, certain in its operation and which maybe economically constructed and readily assembled.

To these and other ends my invention consists in the stop mechanism, having certain details of construction and combinations of parts as will be hereinafter described and more particularly pointed out in the claims. 30 Referring to the drawings in which like numerals of reference designate like parts in the several figures,

Figure 1 is a fragmentary plan view of my improved mechanism as applied to a machine, a portion of which is shown in section;

Figure 2 is a side elevation thereof;

Figure 3 is an elevation of the trip end of my improved mechanism;

Figure 4 is a sectional view, some of the vparts being taken generally upon line 4-4 of Figure 1; and

Figure 5 is a view similar to Figure 3 with the dog and cam in a different relative po- 45 sition.

As herein shown my improved device is attached to the carrier mechanism of a machine whereby articles operated upon are being moved by fingers connected with the in carrier mechanism from one station to another and is particularly adapted for this use, although many other uses therefor will readily suggest themselves to one familiar with the art, i

thereon that In the drawings, the numerals 10 desigmovements is generally referred to as the transfer movement and the latter as the in and out movement. In practice another carrier bar similar to the carrier bar 11 and parallel therewith is used and has fingers attached thereto corresponding to the fingers 12. This carrier bar mechanism constitutes no part of my present invention.

The fingers 12 are connected with holders 13 that are slidably mounted in the clamps fixed to the carrier bar 11. This movement in one direction is accomplished through the medium of the spring 15 which lies in a recess in the clamp 14 and engages the poppet 16 fixed in the holder 13. Each of the holders 13 is provided with a lip 17 within which is mounted a stop pin 18 having a head 19 projects inwardly from the lip 17. i

In operation these carrier slides are moved parallel to their length and then toward each other, at which time an article is grasped between the ends of the fingers 12 and come to a full stop, while the carrier bars for a limited distance continue their movement against the tension of the springs 15 and while the article is so held another endwise movement is imparted to the bars 11 in the direction reverse to that above described and the articles between the fingers 12 are carried to the next station. The bars 11 are then moved outwardly. away from each other, the fingers 12 release their hold upon the article and are returned to their former position through the next reciprocating action of the bars 11, another article is grasped between the fingers and travels to the next station, as above described. There is a possibility of no article being grasped between the fingers or an article bemg out of alignment therewith, or one imperfectly formed by the tools at one of the stations that suggests the desirability of stopping the machine so that no damage or in ury will be done thereto, or any articles destroyed by the improper action of the machine. To accomplish this result is one of the objects of my invention.

Fixed to the carrier bar 11 are a plurality of journal blocks 20 within which is slldably mounted a trip rod 21, having a stop block 22 thereon which engages with an adjacent journal block 20 to limit the relative movement thereof on the said bar.

Upon one end of the said trip rod is a stop collar 23 which engages a bracket 24 adjustably secured to a fixed part. Fixed to the trip rod 21 are a plurality of lock plates 25 corresponding in number with the pairs of fingers 12 and between the lock plate near the left, as shown' in Figure 1, and one of the journal blocks 20 1s a coil spring 26 which surrounds the trip rod 21 and exerts its tension so as to move the said trip rod to the right relatively to the bar 11.

Secured to the bar 11, preferably by adjust able means, is a bracket 27 to which the dog 28 is pivotally secured by the bolt 29. Adjustably secured on the trip rod 21 IS the cam 30, the cam face 31 of wh ch lies at an angle inclined to that of the axis of the trip rod 21 and is movable in the path of the dog 28. I

Fixed in one side of the machlne 10 1s a stud 32 upon which is mounted the rock lever 33 upon the outer end of which is a roll 34 rotatably journaled and the other end of which is connected with the arm 35 by the link 36. This arm 35 is adjustably secured to the shaft 37 journaled 1n bearings 38 upon the machine 10.

Adjacent to the end of the shaft 37 opposite to the arm 35 is a latch 39 and located at a convenient point between its ends is an adjustable trip lever 40, to operate the mechanism manually when desired.

Associated with the machine is a clutch for operating the same, not shown, as it 1s well known in the art and constitutes no part of my present invention. The clutch is however operated through a lever 41 having a lug 42 thereon, which in its down or clutch engaged position is held by the latch 39 (Figure 2) that is moved in one direction by the spring 43, joining a pin 44 in the latch and a pin 45 in the body of the machine.

In Figure 1 the carrier bar is shown in its in position with the fingers in engagement with the article (not shown) and ready to carry, that is, to move to the left. At this time the stop collar 23 is in engagement with the bracket 24 and as the carrier bar 11 moves to the left, the spring 26 keeps the collar 23 against the bracket 24, that is, the rod 21 remains stationary while the carrier bar 11 moves to the left.

The relative position of the dog 28 and the cam 30 when the parts are as shown in Figure 1 is illustrated in Figure 3, that is, the dog is upon the high surface or top of the cam .31. When the carrier bar moves to the left (Fig. 1) the rod 21 remains station- 1,45aee7 ary until the end journal blockthereon ad- 'acent to the bracket 24, engages the stop lock 22, thereafter the rod 21 and guide bar 11 move as a unit. While the guide bar is moving to the left and the rod 21 is stationary, the dog 28 which is indirectly pivoted to the guide bar 11 travels with the guide bar and rides from the high part of the cam 31 to the low part thereof.

The now relative positions thereof are shown in Figure 5. It will be observed that when the dog is in the position just described that the top thereof is underneath the roll 34 and when the guide bar 11 and rod 21 thereafter move as a unit the said dog passes under said roll imparting no motion thereto.

The description of the operation of the parts as above iven is that when conditions are normal, t at is the fingers 12 have grasped an article therebetween and the lips 17 of the holders 13 are in their out position substantially as shown in Figures 1 and 4.

Now if perchance an article is not grasped between the oppositely disposed fingers, the fingers 12 mounted upon the guide bar 11 move inwardly or toward its opposite fingers a greater distance than when conditions are normal. This brings the head 19 of the stop pin 18 opposite the end of the lock plate 25 and then during the movement to the left of the guide bar 11 the rod 21 is moved as a unit therewith by reason of the engagement of said head 19 with the lock plate 25 instead of the blocks 20 and 22 as above described. At this time the dog 28 is upon a high surface of the cam 31- substantially as shown in Figure 3 and is held in this position during the further movement of the guide bar 11 and engages the roll 34 and trips the mechanism and stops the machine through the release of the trip lever 41. The relative position of this lever when so released is shown by broken lines in Figure 2.

The relation of the heads 19 and lock plates 25 is such that engagement therebetween is made after a very limited movement to the left of the guide bar 11. This relative movement being considerably less than that between the blocks 20 and 22, and the timing of the machine operating mechanism is such that the dog 28 is engaged with the trip roll 34, and the machine stops before the tools engage each other- To provide for lateral movement of the fingers 12 upon the guide bar 11 either the lock plates 25 may be made adjustable upon the rod 21 or the parts can be so arranged that there is a limited lost motion between the head 19 and the lock plate 25 that will permit of this lateral adjustment, but not impair the operative relation of the parts so as to prevent a timed stoppage of the mechanism.

Within the limits of the appended claims IOU minor changes and alterationscan be made within my invention and I would therefore desire it to be understood that I do not limit myself to the exact construction herein shown and described. c

Having described my invention what I claim as new and desire to secure by Letters Patent, is:

1. In a carrier mechanism for transferring articles from one station to another; a reciprocating member; a. second member connected therewith and having movement relative thereto; and positively actuated mechanism for stop-ping the movement of the first member, the action of said mechanism being initiated by the second member and transmitted through a part connected with said reciprocating member.

2. In a carrier mechanism for transferring articles-from one station to another; a reclprocating member; a second member connected therewith and having movement relative thereto; a trip member connected with said reciprocating member; an element for controlling the source of power by which said reciprocating member is actuated; and mechanism for actuating said element through said trip member and a part connected with said reciprocating member when the latter is in one of its positions.

3. In a device of the character described the combination with a reciprocating member; of an element for controlling a source of power for operating said member; a work supporting carrier finger movably mounted on said member; and mechanical means, the a tion of which is initiated by the said finger, for automatically actuating said element to shut ofi said source of power when said finger is in one of its positions in relation to said member.

4. In a device of the character described the combination with a reciprocating member; an element for controlling a source of power for operating said member; a carrier finger movably mounted upon said member; a trip member connected with said reciproeating member; a shir'table element associated with said element having a part thereon in the path of movement of said trip member; and mechanical means for causing said trip member to actuate said shiftable member When the said finger is in one of its positions upon said movable member.

5. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted on said member; a trip member connected with said movably mounted member; and mechanism associated with said movably mounted member for actuating said trip member having a part thereon in the path of movement of said finger; and a shiftable member conpart and operatively connected with said element; a trip member associated with said movably mounted member; a carrier finger on said movably mounted member; means assoclated with said movably mounted memher and actuated by said finger when one is in position, for positively actuating said trip member and cause the same to move into the path of. said shiftable device where by the same is actuated and through it the said element thereby shutting off the source of power.

7. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted on said member; a trip member connected with said movably mounted member; a cam for actuating said trip member; means for actuating said eamthrough said finger; a device movably connected to a fixed part and projecting into the path of said trip member and having an operative engagement with said element whereby the movement of said device through the action of said trip member will shut off the source of power operating said movably mounted member.

8. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted on said member; a trip member connected with said movably mounted member; a cam associated with said movably mounted member, and having an independent movement in relation thereto; said cam projecting into the path of said trip member; means actuated through the movement of said carrier finger for holding said cam against movement in relation to said movably mounted member whereby said trip member will be held in one of its positions; and means actuated by said trip member when in the position just described for operating said element to shut off the source of Power that operates said movably mounted member.

9. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted on said member; a trip member connected with said movably mounted member and having an independent movement thereon; cam means for actuating said trip member relatively to said movably mounted member; means for connecting said cam with said movably mounted member so that it may move therewith, and have an independent movement in relation thereto; means controlled by the action of said finger for holding said cam against relative movement thereby holding said trip member in one of its ositions; and a member connected with a xed part projecting in the path of said trip member, and actuated by said trip member, when in the position just described, for operating said element and shut ofl' the source of power of said movably mounted member.

10. In a device of the character described the combination with a movably mounted member; of an element for controlling the source of power for operating said member; a carrier finger movably mounted on said member; atrip member movably connected with said member; a rod connected with said movably mounted member; a cam connected with said rod and during its movement actuating said trip member; means for positively moving said rod in one direction by said carrier finger when in one of its positions; an intermediate member connected with a fixed part and projecting into the path of said trip member and actuated thereby when in one of its positions; and a connection between said intermediate member and said element.

11. In a device of the character described the combination with a movably mounted member; of an element for controlling the source of power for operating said member; a carrier finger movably mounted on said member; a trip member movably connected with said member; a rod connected with said movably mounted member; a cam connected with said rod and during its movement actuating said trip member; means for positively moving said rod in one direction by said carrier finger when in one of its positions; yielding means moving said rod in its opposite direction; an intermediate member connected with a fixed part and projecting into the path of movement of said trip member and actuated thereby, when in one of its positions and means for connecting said intermediate member with said element, whereby its movement through the trip member will release said element therefrom.

12. In a device of the character described the combination with a movably mounted member; of an element for controlling the source of power for operating said member; a carrier finger movably mounted on said member; a trip member movably connected with said member; a rod connected with said movably mounted member; a cam connected with said rod and during its movement actuating said trip member; means for positively moving said rod in one direction by said carrier finger when in one of its positions;

member; of. an element for controlling the source of power for operating said member; a carrier finger movably mounted on said member; a trip member movably connected with said member; a rod connected with said movably mounted member; a cam connected with said rod and during its movement actuating said trip member; means for positively moving said rod in one direction by said carrier finger when in one of its positions; an intermediate member connected with a fixed part and projecting into the path of said trip member and actuated thereby, when in one of its positions; a connection for limiting the movement of said rod during the movement of said movably mounted member and means for connecting said intermediate member with said element, whereby its movement through the trip member will release said element therefrom.

14. In adevice of the character described the combination with a movably mounted member; of a'rod mounted thereon; means for limiting the movement of said rod during the movement of said movably mounted member; a carrier finger connected with said movably mounted member; means connected therewith that engages a part of said rod when said carrier finger is in one of its positions, and cause the same to move as a unit with said movably mounted member; a trip member connected with said movably mounted member; a rock arm projecting into the path of movement of said trip member; and a connection between said rock arm and said element.

15. In a device of the character described the combination with a movably mounted member; a rod mounted thereon; means for limiting the movement of said rod during the movement of said movably mounted member; yielding means for moving said rod upon said movably mounted member in one direction; a cam connected with said rod; a trip member having a movable connection with said member and actuated by said cam; a carrier finger connected with said movably mounted member; means connected therewith that engages apart of said rod and holds the same against the tension of said yielding means when said carrier finger is in one of its positions, and cause the said rod to move as a unit with said movably mounted member; a rock arm projecting into the path of movement of said tri member and a connection between said roe arm and said element.

16. Ina device of the character described the combination with a movably mounted member; of-an element for controlling the source of power fdr operating said member; a carrier finger movably mounted on said member; a trip member having a hinged connection with said movably mounted member; a rod slidably connected with said movably mounted member; a. cam upon said rod for actuating said trip member upon its pivot mounting; means, independent of said movably mounted member, for holding said rod against movement during the movement of said movably mounted member; a stop device adjustably secured to said rod to limit the relative movement thereof in one direction upon said movably mounted member; a rock member projecting into the path of said trip member; and means connecting said rock'member with said element whereby the movement of said rock member will actuate said element and shut ofi the power for actuating said movably mounted member.

17. In a device of the character described the combination with a. movably mounted member; of an element for controlling a source of power for operating said member; a trip member having a hinged connection with said movabl mounted member; a rod slidably connecte with said movably mounted member; a cam upon said rod for actuating said trip member upon its pivot mounting; means, independent of said movably mounted member, for holding said rod against movement during the movement of said movably mounted member; a stop de vice adjustably secured to said rod to limit the relative movement thereof in one direction upon said movably mounted member; a carrier finger mounted on said movably mounted member and in one of its positions engaging a part upon said rod when said stop devlce is inits inoperative position and thereafter moving the same with said movably mounted member; a rock member projecting into the path of said trip member; and means connecting said rock member with said element whereby the movement of said rock member will actuate said element to shut off the power for actuating said movably mounted member.

18. In adevice of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member: a carrier finger movably mounted on said member; a trip member having a hinged connection with said movably mounted member; a rod slidably connected with said movably mounted member; a cam upon said rod for actuating said trip member upon its pivot mounting; means,independent of said movably mounted member, for holding said rod against movement during the movement of said movably mounted member; a stop device adjustably secured to said rod to limit the relative movement thereof in one direction upon said movably mounted member;

yielding means for moving said rod; a rock member projecting into the path of said trip member; means, connecting said rock member with said element whereby the movement of said rock member will actuate said element to shut ofi' the power for actuating said movably mounted member; said yielding means holdin said rod in such relative osition that said movably mounted member will move independently of said rod until said stop device is in engagement with a part upon said movably mounted member; and meansfor actuating said rod before said stop device can become operative; comprising mechanism connected with said carrier finger that engages a part upon said rod and cause said rod and movably mounted member to thereafter travel as a unit.

19. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted on said member; a trip member having a hinged connection with said movably mounted member; a rod slidably connected with said movably mounted member; a cam upon said rod for actuating said trip member upon its pivot mounting; means for adjustablv securing said cam in relation to said finger; means, independent of said movably mounted member, for holding said rod against movement during the movement of said movably mounted member; a stop device adjustably secured to said rod to limit the rela tive movement thereof in one direction upon said movably mounted member; a rock member projecting into the path of said trip member; and means connecting said rock member with said element whereby the movement of said rock member will actuate said element to shut off the power for actuating said movably mounted member.

20. In a device of the character described the combination with a movably mounted member; of an element for controlling a source of power for operating said member; a carrier finger movably mounted upon said member; a trip member connected with said movably mounted member; a rod mounted upon said movably mounted member; a cam connected therewith for actuating said trip member; means for limiting the relative movement of said rod with relation to said movably mounted member; said means comprising an adjustable stop; and means for determining the relative position of said cam in relation to said finger, comprising mechanism connected with said finger and engaging a part upon said rod before said stop device on said rod is in an operative position.

21. In a device of the character described, the combination with a movably mounted member; of an element for controlling a source of power foroperating said member; a connection between said member and element whereby the latter is released for move- 'ment through said movably mounted mem ber; a plurality of carrier fingers movably mounted on said member; and means, associated with said 'movably mounted member, the action'of which, initlated by any one of said fingers,will automatically actuate said element through said connection to shut off the source of power when said finger is in gne of its positions in relation to said mem- In testimony whereof, I have hereunto affixed my signature.

JESSE B. BURTON. 

